Top Definition
oco
A: a ruthless gang of street theives.

B: a drinking, wrecking, skating team.

c: a clan of parklers parkle
a- you see those oco boys?
b- yeah, they really tore shit up.
by chris.keebler June 27, 2004
1 more definition
OCO
abbreviation for 'oh come on' when using instant messanger.
Screen name 1: I invented pencils!
Screen name 2: OCO!
by Laura November 11, 2003

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